Comedian losing stone makes gibe (4)
I believe the answer is:
jeer
'gibe' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for jeer that I've seen before include "Ridicule noisily" , "Henry ---, Richard II's enemy, successor" , "Tease" , "Scoff, deride, mock" , "Call out derisively" .)